76516509 has 16 divisors (see below), whose sum is σ = 104100480. Its totient is φ = 49978560.

The previous prime is 76516493. The next prime is 76516511. The reversal of 76516509 is 90561567.

It is not a de Polignac number, because 76516509 - 2⁴ = 76516493 is a prime.

It is a super-2 number, since 2×76516509² = 11709552299094162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76516109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57352 + ... + 58670.

It is an arithmetic number, because the mean of its divisors is an integer number (6506280).

Almost surely, 2^76516509 is an apocalyptic number.

It is an amenable number.

76516509 is a deficient number, since it is larger than the sum of its proper divisors (27583971).

76516509 is a wasteful number, since it uses less digits than its factorization.

76516509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 76516509 is about 8747.3715480709. The cubic root of 76516509 is about 424.5397721618.

The spelling of 76516509 in words is "seventy-six million, five hundred sixteen thousand, five hundred nine".